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# J-G van der Toorn

678 total contributions since 2012

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Operate on matrices of unequal, yet similar, size
You may want to add a vector to a matrix, implying that the vector is added to each column of the matrix. Or multiply a 3x4x5 ma...

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Numbers on 7-segment
This is a 7-segment: _ |_| |_| It's a 3-by-3 char matrix.It has made by 3 characters: '_' , '|' and ' ' (space...

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Calculate time taken by light to reach earth surface
We know the time(seconds) taken by light to reach surface of earth. What if the distance varies yearly or source of light moves ...

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Draw 'H'
Draw a x-by-x matrix 'H' using 1 and 0. (x is odd and bigger than 2) Example: x=5 ans= [1 0 0 0 1 1 0 0 0 1 ...

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Draw 'F'
Draw a x-by-x matrix 'F' using 1 and 0. (x is odd and bigger than 4) Example: x=5 ans= [1 1 1 1 1 1 0 0 0 0 ...

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Draw 'E'
Draw a x-by-x matrix 'E' using 1 and 0. (x is odd and bigger than 4) Example: x=5 ans= [1 1 1 1 1 1 0 0 0 0 ...

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Mean = Standard Deviation
Create a series with following properties; # All of the members should be positive integer # Mean of the series should be in...

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Find prime number couples
Given a vector a, which will always contain at least one pair of prime numbers couple, return a matrix called 'couple' in which ...

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Angle between Two Vectors
The dot product relationship, a dot b = | a | | b | cos(theta), can be used to determine the acute angle between vector a and ve...

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Clockwise or Counterclockwise
Given a list of 2-d points defining the vertices of a polygon, determine whether these points are sorted clockwise. The input...

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Calculate the area of a triangle between three points
Calculate the area of a triangle between three points: P1(X1,Y1) P2(X2,Y2) P3(X3,Y3) these three points are the vert...

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Television Screen Dimensions
Given a width to height ratio of a TV screen given as _w_ and _h_ as well as the diagonal length of the television _l_, return t...

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Second Diagonal
Transpose the matrix from it's second diagonal.

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find number of times of occurrence of the most frequent number in a row vector
In a given row vector, find the number of times a mode of a row vector has occurred example: in [2 5 5 5 5 3], output is 4 ...

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Draw 'D'.
Draw a x-by-x matrix 'D' using 0 and 1. example: x=4 ans= [1 1 1 0 1 0 0 1 1 0 0 1 1 1 1 0]

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Create the equation: y=(3x)^2+(5x)+35 and compute y for various values of x

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function to compute root mean square of first nn positive odd integers
Write a function called odd_rms that returns orms, which is the square root of the mean of the squares of the first nn positive ...

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Percentage of zeros in a matrix of only 1s and 0s
Write a function called _zero_stat_ that takes a matrix as an input that only has 0 and 1 elements. The function needs to comput...

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Datetime basics
Generate the datetime scalar representing the current date

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Check if there are white spaces in the input string
If there are white spaces in the input string, output=1 else 0

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Remove white spaces at the end of the input string
Remove all trailing white spaces at the end of the input strings

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Perimeter of a semicircle
Given the diameter d, find the perimeter of a semicircle

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Nth root of a number
Given an input and a number N, find the Nth root of the number(s)

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Dial Up
Each number on telephone keypads, except 0 and 1, corresponds to a set of uppercase letters as shown in this list: 2 ABC, 3 DEF...

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Draw 'O' !
Given n as input, generate a n-by-n matrix 'O' using 0 and 1 . example: n=4 ans= [1 1 1 1 1 0 0 1 ...

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Draw 'I'
Given n as input, draw a n-by-n matrix 'I' using 0 and 1. example: n=3 ans= [0 1 0 0 1 0 0 1 0] n=...

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Day counter function
Write a function called _day_counter_ that returns the number of Mondays that fell on the first day of the month in a given year...

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Draw a 'N'!
Given n as input, generate a n-by-n matrix 'N' using 0 and 1 . Example: n=5 ans= [1 0 0 0 1 1 1 0 0 1 1 0 ...

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Computational power of Cody servers
It has been <https://en.wikipedia.org/wiki/Moore%27s_law#History predicted> that the performance of integrated circuits would _d...

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Basics: counting digits of a number irrespective of the sign
publish the number of digits in any input integer example: -23---->2

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